cmd-new-session.c

   1 /* $OpenBSD$ */
   2
   3 /*
   4  * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
   5  *
   6  * Permission to use, copy, modify, and distribute this software for any
   7  * purpose with or without fee is hereby granted, provided that the above
   8  * copyright notice and this permission notice appear in all copies.
   9  *
  10  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  11  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  12  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  13  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  14  * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
  15  * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
  16  * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  17  */
  18
  19 #include <sys/types.h>
  20
  21 #include <pwd.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24 #include <termios.h>
  25 #include <unistd.h>
  26
  27 #include "tmux.h"
  28
  29 /*
  30  * Create a new session and attach to the current terminal unless -d is given.
  31  */
  32
  33 int     cmd_new_session_check(struct args *);
  34 int     cmd_new_session_exec(struct cmd *, struct cmd_ctx *);
  35
  36 const struct cmd_entry cmd_new_session_entry = {
  37         "new-session", "new",
  38         "dn:s:t:x:y:", 0, 1,
  39         "[-d] [-n window-name] [-s session-name] [-t target-session] "
  40         "[-x width] [-y height] [command]",
  41         CMD_STARTSERVER|CMD_CANTNEST|CMD_SENDENVIRON,
  42         NULL,
  43         cmd_new_session_check,
  44         cmd_new_session_exec
  45 };
  46
  47 int
  48 cmd_new_session_check(struct args *args)
  49 {
  50         if (args_has(args, 't') && (args->argc != 0 || args_has(args, 'n')))
  51                 return (-1);
  52         if (!args_has(args, 'd') &&
  53             (args_has(args, 'x') || args_has(args, 'y')))
  54                 return (-1);
  55         return (0);
  56 }
  57
  58 int
  59 cmd_new_session_exec(struct cmd *self, struct cmd_ctx *ctx)
  60 {
  61         struct args             *args = self->args;
  62         struct session          *s, *old_s, *groupwith;
  63         struct window           *w;
  64         struct window_pane      *wp;
  65         struct environ           env;
  66         struct termios           tio, *tiop;
  67         struct passwd           *pw;
  68         const char              *newname, *target, *update, *cwd, *errstr;
  69         char                    *overrides, *cmd, *cause;
  70         int                      detached, idx;
  71         u_int                    sx, sy, i;
  72
  73         newname = args_get(args, 's');
  74         if (newname != NULL && session_find(newname) != NULL) {
  75                 ctx->error(ctx, "duplicate session: %s", newname);
  76                 return (-1);
  77         }
  78
  79         target = args_get(args, 't');
  80         if (target != NULL) {
  81                 groupwith = cmd_find_session(ctx, target);
  82                 if (groupwith == NULL)
  83                         return (-1);
  84         } else
  85                 groupwith = NULL;
  86
  87         /*
  88          * There are three cases:
  89          *
  90          * 1. If cmdclient is non-NULL, new-session has been called from the
  91          *    command-line - cmdclient is to become a new attached, interactive
  92          *    client. Unless -d is given, the terminal must be opened and then
  93          *    the client sent MSG_READY.
  94          *
  95          * 2. If cmdclient is NULL, new-session has been called from an
  96          *    existing client (such as a key binding).
  97          *
  98          * 3. Both are NULL, the command was in the configuration file. Treat
  99          *    this as if -d was given even if it was not.
 100          *
 101          * In all cases, a new additional session needs to be created and
 102          * (unless -d) set as the current session for the client.
 103          */
 104
 105         /* Set -d if no client. */
 106         detached = args_has(args, 'd');
 107         if (ctx->cmdclient == NULL && ctx->curclient == NULL)
 108                 detached = 1;
 109
 110         /*
 111          * Save the termios settings, part of which is used for new windows in
 112          * this session.
 113          *
 114          * This is read again with tcgetattr() rather than using tty.tio as if
 115          * detached, tty_open won't be called. Because of this, it must be done
 116          * before opening the terminal as that calls tcsetattr() to prepare for
 117          * tmux taking over.
 118          */
 119         if (ctx->cmdclient != NULL && ctx->cmdclient->tty.fd != -1) {
 120                 if (tcgetattr(ctx->cmdclient->tty.fd, &tio) != 0)
 121                         fatal("tcgetattr failed");
 122                 tiop = &tio;
 123         } else
 124                 tiop = NULL;
 125
 126         /* Open the terminal if necessary. */
 127         if (!detached && ctx->cmdclient != NULL) {
 128                 if (!(ctx->cmdclient->flags & CLIENT_TERMINAL)) {
 129                         ctx->error(ctx, "not a terminal");
 130                         return (-1);
 131                 }
 132
 133                 overrides =
 134                     options_get_string(&global_s_options, "terminal-overrides");
 135                 if (tty_open(&ctx->cmdclient->tty, overrides, &cause) != 0) {
 136                         ctx->error(ctx, "open terminal failed: %s", cause);
 137                         xfree(cause);
 138                         return (-1);
 139                 }
 140         }
 141
 142         /* Get the new session working directory. */
 143         if (ctx->cmdclient != NULL && ctx->cmdclient->cwd != NULL)
 144                 cwd = ctx->cmdclient->cwd;
 145         else {
 146                 pw = getpwuid(getuid());
 147                 if (pw->pw_dir != NULL && *pw->pw_dir != '\0')
 148                         cwd = pw->pw_dir;
 149                 else
 150                         cwd = "/";
 151         }
 152
 153         /* Find new session size. */
 154         if (detached) {
 155                 sx = 80;
 156                 sy = 24;
 157                 if (args_has(args, 'x')) {
 158                         sx = strtonum(
 159                             args_get(args, 'x'), 1, USHRT_MAX, &errstr);
 160                         if (errstr != NULL) {
 161                                 ctx->error(ctx, "width %s", errstr);
 162                                 return (-1);
 163                         }
 164                 }
 165                 if (args_has(args, 'y')) {
 166                         sy = strtonum(
 167                             args_get(args, 'y'), 1, USHRT_MAX, &errstr);
 168                         if (errstr != NULL) {
 169                                 ctx->error(ctx, "height %s", errstr);
 170                                 return (-1);
 171                         }
 172                 }
 173         } else if (ctx->cmdclient != NULL) {
 174                 sx = ctx->cmdclient->tty.sx;
 175                 sy = ctx->cmdclient->tty.sy;
 176         } else {
 177                 sx = ctx->curclient->tty.sx;
 178                 sy = ctx->curclient->tty.sy;
 179         }
 180         if (sy > 0 && options_get_number(&global_s_options, "status"))
 181                 sy--;
 182         if (sx == 0)
 183                 sx = 1;
 184         if (sy == 0)
 185                 sy = 1;
 186
 187         /* Figure out the command for the new window. */
 188         if (target != NULL)
 189                 cmd = NULL;
 190         else if (args->argc != 0)
 191                 cmd = args->argv[0];
 192         else
 193                 cmd = options_get_string(&global_s_options, "default-command");
 194
 195         /* Construct the environment. */
 196         environ_init(&env);
 197         update = options_get_string(&global_s_options, "update-environment");
 198         if (ctx->cmdclient != NULL)
 199                 environ_update(update, &ctx->cmdclient->environ, &env);
 200
 201         /* Create the new session. */
 202         idx = -1 - options_get_number(&global_s_options, "base-index");
 203         s = session_create(newname, cmd, cwd, &env, tiop, idx, sx, sy, &cause);
 204         if (s == NULL) {
 205                 ctx->error(ctx, "create session failed: %s", cause);
 206                 xfree(cause);
 207                 return (-1);
 208         }
 209         environ_free(&env);
 210
 211         /* Set the initial window name if one given. */
 212         if (cmd != NULL && args_has(args, 'n')) {
 213                 w = s->curw->window;
 214
 215                 xfree(w->name);
 216                 w->name = xstrdup(args_get(args, 'n'));
 217
 218                 options_set_number(&w->options, "automatic-rename", 0);
 219         }
 220
 221         /*
 222          * If a target session is given, this is to be part of a session group,
 223          * so add it to the group and synchronize.
 224          */
 225         if (groupwith != NULL) {
 226                 session_group_add(groupwith, s);
 227                 session_group_synchronize_to(s);
 228                 session_select(s, RB_ROOT(&s->windows)->idx);
 229         }
 230
 231         /*
 232          * Set the client to the new session. If a command client exists, it is
 233          * taking this session and needs to get MSG_READY and stay around.
 234          */
 235         if (!detached) {
 236                 if (ctx->cmdclient != NULL) {
 237                         server_write_client(ctx->cmdclient, MSG_READY, NULL, 0);
 238
 239                         old_s = ctx->cmdclient->session;
 240                         if (old_s != NULL)
 241                                 ctx->cmdclient->last_session = old_s;
 242                         ctx->cmdclient->session = s;
 243                         session_update_activity(s);
 244                         server_redraw_client(ctx->cmdclient);
 245                 } else {
 246                         old_s = ctx->curclient->session;
 247                         if (old_s != NULL)
 248                                 ctx->curclient->last_session = old_s;
 249                         ctx->curclient->session = s;
 250                         session_update_activity(s);
 251                         server_redraw_client(ctx->curclient);
 252                 }
 253         }
 254         recalculate_sizes();
 255         server_update_socket();
 256
 257         /*
 258          * If there are still configuration file errors to display, put the new
 259          * session's current window into more mode and display them now.
 260          */
 261         if (cfg_finished && !ARRAY_EMPTY(&cfg_causes)) {
 262                 wp = s->curw->window->active;
 263                 window_pane_set_mode(wp, &window_copy_mode);
 264                 window_copy_init_for_output(wp);
 265                 for (i = 0; i < ARRAY_LENGTH(&cfg_causes); i++) {
 266                         cause = ARRAY_ITEM(&cfg_causes, i);
 267                         window_copy_add(wp, "%s", cause);
 268                         xfree(cause);
 269                 }
 270                 ARRAY_FREE(&cfg_causes);
 271         }
 272
 273         return (!detached);     /* 1 means don't tell command client to exit */
 274 }